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claudia-bouman
Team TFS
Team TFS
1) Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States, 2) School of Earth, Ocean and Climate Sciences, Indian Institute of Technology-Bhubaneswar, Bhubaneswar, Odisha 751013, India
Analytical Chemistry (2014), V86, pp2982−2988, doi: 10.1021/ac403413y
Determination of Osmium Concentrations and 187Os/188Os of Crude Oils and Source Rocks by Coupling High-Pressure, High-Temperature Digestion with Sparging OsO4 into a Multicollector Inductively Coupled Plasma Mass Spectrometer
Indra S. Sen (1,2) and Bernhard Peucker-Ehrenbrink (1)
The 187Os/188Os ratio that is based on the β−-decay of 187Re to 187Os (t1/2 = 41.6 billion years) is widely used to investigate petroleum system processes. Despite its broad applicability to studies of hydrocarbon deposits worldwide, a suitable matrix-matched reference material for Os analysis does not exist. In this study, a method that enables Os isotope measurement of crude oil with in-line Os separation and purification from the sample matrix is proposed. The method to analyze Os concentration and 187Os/187Os involves sample digestion under high pressure and high temperature using a high pressure asher (HPA-S, Anton Paar), sparging of volatile osmium tetroxide from the sample solution, and measurements using multicollector inductively coupled plasma mass spectrometry (MCICPMS).
  • MC-ICPMS
  • Neptune
  • Os isotopes
  • Crude oils
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